Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8ccd454384e6b2…

MALICIOUS

PDF

59.9 KB Created: 2020-03-09 10:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9dcc0fa7f0ab5119e043f13cfe199fd3 SHA-1: b285bfcc1380e47067dd98ff1e42d87c2de4d626 SHA-256: 5f8ccd454384e6b2270dc8afa398f7133d6cdac20372c0d9eba46ee48c90490b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by an ML classifier. It contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO abuse tactic. The document body itself is heavily obfuscated but contains references to URLs that are likely part of this scheme. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cyclebavaria.com/uploads/1/3/0/5/130588467/130588467.html#3d+metal+printing+wikipedia
    • http://laurelmedpa.com/uploads/1/3/0/7/130739867/c96224.pdf
    • http://www.glimo.org/uploads/1/3/0/8/130873965/suwepuzeparubiz.pdf
    • http://aestheticsplus.club/uploads/1/3/0/6/130621507/xovupu_kodalu_goxidu.pdf
    • http://birminghammasonandbrickworks.com/uploads/1/3/0/7/130740211/6263278.pdf
    • http://simplicityaccountingllc.com/uploads/1/3/0/6/130621084/9679647.pdf
    • http://nativeamericanfluteshop.com/uploads/1/3/0/3/130379150/285e3f00d881.pdf
    • http://hostmaster.livelikeme.info/uploads/1/3/0/5/130551697/8332996.pdf
    • http://culturalinnovationgroup.org/uploads/1/3/0/4/130436152/435ee159.pdf
    • http://webdisk.hbhospice.com/uploads/1/3/0/2/130288363/7274344.pdf
    • http://myentouragemusic.com/uploads/1/3/0/7/130775905/matozituxa.pdf
    • http://www.okanaganii.com/uploads/1/3/0/3/130323318/1807625.pdf
    • http://splinteredmindshirts.com/uploads/1/3/0/7/130776271/1f898458f3436.pdf
    • http://tombstonerepair.com/uploads/1/3/0/6/130604258/7313974.pdf
    • http://musicmastertraining.com/uploads/1/3/0/2/130287536/tuxolufore.pdf
    • http://spookfest.net/uploads/1/3/0/5/130538869/dadapub.pdf
    • http://periscopedigital.com.au/uploads/1/3/0/2/130271243/zuxezabupagofe.pdf
    • http://williampmorgan.com/uploads/1/3/0/6/130620561/suxabubaxupu-pidupitafunek-wajokikanu-gasawinixaxozar.pdf
    • http://cpdhub.co.uk/uploads/1/3/0/3/130379251/6d80bd37ba12d.pdf
    • http://talkupyute.com/uploads/1/3/0/2/130289779/ea1855153a00f.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be63.bin
1934fc5bf797af7a32bd326d840f4277c91e108377ba99ef6a25b1ac4d6de842
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE63 9536 bytes